QUESTION 91A metro service provider is planning Resilient Ethernet Protocol for his backbone. Which two aspects must be considered before the network design is finalized? (Choose two.)

A. Two Resilient Ethernet Protocol segments can be connected redundantly at two points. One connection will be blocked, using the Spanning Tree Protocol defined in IEEE 802.1D.B. UniDirectional Link Detection Protocol can be enabled on Resilient Ethernet Protocol interfaces to detect unidirectional failures.C. The guaranteed convergence recovery time is less than 50 ms for the local segment.D. A Resilient Ethernet Protocol segment is limited to a maximum of seven devices.E. VLAN load balancing for optimal bandwidth usage is supported in any Resilient Ethernet Protocol segment.

A. MPLS QoS is a scalable and simple solution because it only requires application at the Edge-LSR.B. MPLS can force packets into specific paths and bandwidths based on Edge-LSR mapping of DSCP to EXP.C. DiffServ information must be made known to the LSR in the MPLS header using the EXP field.D. On egress from the Edge-LSR, the EXP field is used for PHB QoS towards the CE.

A. By default, all EIGRP routes are automatically summarized; all routes will be summarized unless the no-auto summary command is configured.B. By default, EIGRP automatically summarizes internal routes, but only each time a major network boundary is crossed.C. EIGRP route summarization can reduce the query diameter to help prevent SIA problems.D. Summary routes are inserted in the routing table with a next hop of null 0 and a high administrative distance, to prevent black holing of traffic.E. The metric for each summarized route is inherited from the lowest metric of the component routes.

Answer: BCE

QUESTION 94Which two resources are propagated by the headend router for constrained based path computation with MPLS Traffic Engineering? (Choose two.)

QUESTION 95What statement is true about designing a policy in which more than one class share a queue?

A. It must be avoided under all circumstances.B. It will result in a negative class.C. It requires consideration of the performance targets of classes sharing the queue.D. It should be deployed throughout the network to simplify the design.

Answer: C

QUESTION 96You have discovered packets you think are part of an attack. What benefit would you gain from redirecting them through a packet scrubbing device?

QUESTION 97What is the primary requirement for deploying OSPF graceful restart on a router?

A. Aggressive routing protocol hellos and keepalives must be running on the router.B. The adjacent router must support graceful restart helper mode.C. Some form of fast Layer 2 down detection must be enabled on the router.D. The adjacent routers must be enabled to forward traffic during the failure.

Answer: B

QUESTION 98A company is planning to connect its 30 sites with a VPLS WAN backbone. A router at each site should establish neighborships with all other routers using the OSPF routing protocol. Which three points must be considered regarding DR and BDR when different router platforms are used? (Choose three.)

A. It is a best practice that the routers with the most powerful hardware should take the role of the DR and BDR.B. If the IP OSPF priority is the same for all routers, the highest loopback IP address and router ID will decide which routers will take the DR and BDR role during the selection process.C. To select the DR and BDR, the IP OSPF priority must be set to a higher value than the default value at the DR and BDR during the selection process.D. To select the DR and BDR, the IP OSPF priority must be set to a lower value than the default value at the DR and BDR during the selection process.E. The role for the DR and BDR will be selected when a new OSPF router comes up.F. To force two routers to become a DR and a BDR, the IP OSPF priority can be set to zero at all other OSPF routers.

Answer: ABF

QUESTION 99A network administrator is in charge of multiple IPsec VPN headend devices that service thousands of remote connectivity, point-to-point, IPsec/GRE tunnels. During a recent power outage, in which it was found that a backup power supply in one of those headend devices was faulty, one of the headend routers suffered a complete shutdown event. When the router was successfully recovered, remote users found intermittent connectivity issues that went away after several hours. Network operations staff accessed the headend devices and found that the recently recovered unit was near 100% CPU for a long period of time. How would you redesign the network VPN headend devices to prevent this from happening again in the future?

A. Move the tunnels more evenly across the headend devices.B. Implement Call Admission Control.C. Use the scheduler allocate command to curb CPU usage.D. Change the tunnels to DMVPN.

Answer: B

QUESTION 100Which technique can you use to detect forwarding path failures at a uniform rate, and reconvergence times will be consistent and predictable when your routers are in the same broadcast domain?

A. Enable BFD on your routers.B. Configure your routers with IP-SLA to ping the peer router.C. Configure your routers with IP-SLA and track to ping the peer and switch to a default route if the pings fail.D. Tune your routing protocol timers.